40530638 has 16 divisors (see below), whose sum is σ = 62282304. Its totient is φ = 19772640.

The previous prime is 40530617. The next prime is 40530647. The reversal of 40530638 is 83603504.

It is a self number, because there is not a number n which added to its sum of digits gives 40530638.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50456 + ... + 51252.

It is an arithmetic number, because the mean of its divisors is an integer number (3892644).

Almost surely, 2^40530638 is an apocalyptic number.

40530638 is a deficient number, since it is larger than the sum of its proper divisors (21751666).

40530638 is a wasteful number, since it uses less digits than its factorization.

40530638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 40530638 is about 6366.3677242208. The cubic root of 40530638 is about 343.5008478643.

The spelling of 40530638 in words is "forty million, five hundred thirty thousand, six hundred thirty-eight".